package fltk: libpng 1.5 compatibility

src/fltk-1-png.patch

@@ -0,0 +1,61 @@
+This file is part of mingw-cross-env.
+See doc/index.html for further information.
+
+http://www.fltk.org/strfiles/2542/libpng-1.5.diff
+Index: src/Fl_PNG_Image.cxx
+===================================================================
+--- a/src/Fl_PNG_Image.cxx	(Revision 8485)
++++ b/src/Fl_PNG_Image.cxx	(Arbeitskopie)
+@@ -66,6 +66,7 @@
+   png_structp	pp;			// PNG read pointer
+   png_infop	info;			// PNG info pointers
+   png_bytep	*rows;			// PNG row pointers
++  int		num_trans = 0;		// PNG # of transp. colors
+ 
+ 
+   // Open the PNG file...
+@@ -75,7 +76,7 @@
+   pp   = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+   info = png_create_info_struct(pp);
+ 
+-  if (setjmp(pp->jmpbuf))
++  if (setjmp(png_jmpbuf(pp)))
+   {
+     Fl::warning("PNG file \"%s\" contains errors!\n", png);
+     return;
+@@ -87,27 +88,28 @@
+   // Get the image dimensions and convert to grayscale or RGB...
+   png_read_info(pp, info);
+ 
+-  if (info->color_type == PNG_COLOR_TYPE_PALETTE)
++  if (png_get_color_type(pp, info) == PNG_COLOR_TYPE_PALETTE)
+     png_set_expand(pp);
+ 
+-  if (info->color_type & PNG_COLOR_MASK_COLOR)
++  if (png_get_color_type(pp, info) & PNG_COLOR_MASK_COLOR)
+     channels = 3;
+   else
+     channels = 1;
+ 
+-  if ((info->color_type & PNG_COLOR_MASK_ALPHA) || info->num_trans)
++  png_get_tRNS(pp, info, 0, &num_trans, 0);
++  if ((png_get_color_type(pp, info) & PNG_COLOR_MASK_ALPHA) || num_trans)
+     channels ++;
+ 
+-  w((int)(info->width));
+-  h((int)(info->height));
++  w((int)(png_get_image_width(pp, info)));
++  h((int)(png_get_image_height(pp, info)));
+   d(channels);
+ 
+-  if (info->bit_depth < 8)
++  if (png_get_bit_depth(pp, info) < 8)
+   {
+     png_set_packing(pp);
+     png_set_expand(pp);
+   }
+-  else if (info->bit_depth == 16)
++  else if (png_get_bit_depth(pp, info) == 16)
+     png_set_strip_16(pp);
+ 
+ #  if defined(HAVE_PNG_GET_VALID) && defined(HAVE_PNG_SET_TRNS_TO_ALPHA)

src/fltk.mk

@@ -27,7 +27,6 @@ define $(PKG)_BUILD
         --disable-shared \
         --prefix='$(PREFIX)/$(TARGET)' \
         --enable-threads \
-        --enable-localpng \
         LIBS='-lws2_32'
     $(SED) -i 's,-fno-exceptions,,' '$(1)/makeinclude'
     $(MAKE) -C '$(1)' -j '$(JOBS)' install DIRS=src LIBCOMMAND='$(TARGET)-ar cr'